20510758828 has 48 divisors (see below), whose sum is σ = 42581274624. Its totient is φ = 8462226240.

The previous prime is 20510758789. The next prime is 20510758867. The reversal of 20510758828 is 82885701502.

It is an interprime number because it is at equal distance from previous prime (20510758789) and next prime (20510758867).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47476 + ... + 208027.

It is an arithmetic number, because the mean of its divisors is an integer number (887109888).

Almost surely, 2^20510758828 is an apocalyptic number.

20510758828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20510758828 is an abundant number, since it is smaller than the sum of its proper divisors (22070515796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20510758828 is a wasteful number, since it uses less digits than its factorization.

20510758828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255622 (or 255620 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 46.

The spelling of 20510758828 in words is "twenty billion, five hundred ten million, seven hundred fifty-eight thousand, eight hundred twenty-eight".